A method for determining an optimal frequency (fo) for the execution of a software application on an information processing system. The method includes a first execution of said application at a predetermined frequency (fd), making it possible to determine an overall execution time (Tg) and an overall energy consumption (Eg) and a second execution of said application at the same frequency by means of a measurement tool, making it possible to determine measurements (TMPI*, TIO*, Tg*) on said execution; a step of determining a first law providing an execution time (t(f)) as a function of the frequency (f), and a second law providing an energy consumption (E(f)) as a function of the frequency (f); and a step of determining said optimal frequency (fo) as the frequency optimizing a criterion (C(f)) combining said execution time and said energy consumption, as a function of the frequency.